First key pressed doesn't work?

Question

Strange, but lately, I would say about 85% of the time, the first key I hit on my keyboard doesn't work. It doesn't matter what key, letter or number, it doesn't work. I'll look up at what I've typed and the first letter is always missing. It's turning into a huge nuisance and I don't think it's me not pressing hard enough or something silly like that, because it happens so very often and I certainly am not changing the way I type for the last 30 years or so.
Any ideas what could be causing it? It's as if it takes a second for the keyboard to realize it's being used and by then, I've typed on by.
I'm using the standard Apple keyboard that came with the G5, but it's not the original. This one I've had for about a year and a half.
tia.

Answer 1

I had your issue on two Macs for over a year. A combination of the following cleared it up for me;
Try using Disk Utility to do a Disk Repair, as shown in this link, while booted up on your install disk.
You could have some directory corruption. Let us know what errors Disk Utility reports and if DU was able to repair them.
Then I Repaired Permissions in DU using the version on your hard drive.
Then I downloaded the
Combo Update, yours would be the 10.5.4 Combo
You can apply it right over the one you have now with no trouble--use the link, not Software Updates version.
Repaired Permissions and made sure all the other updates for my Mac's were up to date.
Then I went further with it, and used a utility you may not have.
I used and would recommend DiskWarrior.
After all these actions the issue I had (yours) disappeared. Some here have said one of the recent updates dealt with this agravating condition, and if so, thank you Apple!
I feel my tips are what fixed it for me. I was a big contributor to two enormous threads on this problem, and have read every post on the subject.
Hope this helps.
DALE